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  • Title: [Surveillance of soil-borne nematodiasis in Yancheng City from 2016 to 2020].
    Author: Sun BC, Yao XJ, Xu ZM.
    Journal: Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi; 2021 Oct 26; 34(1):92-94. PubMed ID: 35266365.
    Abstract:
    OBJECTIVE: To understand the prevalence of soil-transmitted nematode infections in Yancheng City from 2016 to 2020, so as to provide insights into the development of the scheme for further soil-transmitted nematodiasis surveillance. METHODS: Soil-borne nematode infections were detected using the modified Kato-Katz method (two slides for one sample) among the permanent residents living in Yancheng City from 2016 to 2020, and Enterobius vermicularis infection was additionally detected among children at ages of 12 years and lower using the adhesive cellophane-tape perianal swab method. The prevalence and intensity of human soil-borne nematode and E. vermicularis infections were descriptively analyzed. RESULTS: A total of 51 259 person-time residents were detected for soil-borne nematode infections in Yancheng City from 2016 to 2020, and 48 egg-positives were identified, with a 0.09% prevalence. The soil-borne nematodes infecting residents included Ascaris lumbricoides, hookworm and Trichuris trichiura, with 0.04%, 0.05% and 0.002% prevalence rates of infections, and all infections were mild. There was a region-specific prevalence of soil-borne nematode infections in Yancheng City (χ2 = 18.21, P = 0.02), with the highest prevalence seen in Funing County (0.21%), while no infections were detected in Dafeng District for five successive years. The overall prevalence of E. vermicularis infections was 0.22% among children at ages of 12 years and lower in Yancheng City. CONCLUSIONS: The prevalence of soil-borne nematode infections appears a gradual decline in residents living in Yancheng City from 2016 to 2020, and is at an extremely low level. Further surveillance of soil-transmitted nematodiasis requires to be intensified targeting key regions and populations to consolidate the control achievements. ［摘要］ 目的 了解2016—2020年盐城市土源性线虫感染情况, 为后续土源性线虫病监测方案的制定提供科学依据。方法 2016—2020年对盐城市3岁以上常住居民采用改良加藤厚涂片法 (1粪2检) 进行土源性线虫感染检测, 12周岁及以下儿童同时采用透明胶纸肛拭子法进行蛲虫感染检测, 对土源性线虫、蛲虫感染率及感染度进行描述性分析。结果 2016—2020年全市累计开展人群土源性线虫病监测51 259人·次, 其中阳性48人·次, 土源性线虫感染率为0.09%; 感染虫种包括蛔虫、钩虫、鞭虫, 感染率分别为0.04%、0.05%和0.002%, 均为轻度感染。不同县 (市、区) 居民土源性线虫感染率差异有统计学意义 (χ2 = 18.21, P = 0.02), 以阜宁县最高, 感染率为0.21%; 大丰区连续5年未查见感染者。5年全市儿童蛲虫总体感染率为0.22%。结论 2016—2020年盐城市土源性线虫感染率逐渐下降, 已处于极低流行状态。后续应加强重点地区及人群土源性线虫病监测, 以巩固防治成果。.
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